import { Currency } from "@interlay/monetary-js";
import { ApiPromise } from "@polkadot/api";
import { StorageKey, u32, u128 } from "@polkadot/types";
import { InterbtcPrimitivesVaultCurrencyPair, OrmlTraitsAssetRegistryAssetMetadata } from "@polkadot/types/lookup";
import { Option } from "@polkadot/types-codec";
import { ForeignAsset } from "../types";
/**
 * @category BTC Bridge
 */
export interface AssetRegistryAPI {
    /**
     * Get all currencies (foreign assets) in the asset registry.
     * @returns A list of currencies.
     */
    getForeignAssets(): Promise<Array<ForeignAsset>>;
    /**
     * Get foreign asset by its id.
     * @param id The id of the foreign asset.
     * @returns The foreign asset.
     */
    getForeignAsset(id: number | u32): Promise<ForeignAsset>;
    /**
     * Get all foreign assets which have a registered collateral ceiling, meaning they can be used as collateral currency.
     *
     * @returns All foreign assets that have been registered as collateral currency
     */
    getCollateralForeignAssets(): Promise<Array<ForeignAsset>>;
}
export type AssetKey = StorageKey<[u32]>;
export type AssetRegistryMetadataTuple = [StorageKey<[u32]>, Option<OrmlTraitsAssetRegistryAssetMetadata>];
export type UnwrappedAssetRegistryMetadataTuple = [StorageKey<[u32]>, OrmlTraitsAssetRegistryAssetMetadata];
export type SystemCollateralCeilingTuple = [StorageKey<[InterbtcPrimitivesVaultCurrencyPair]>, Option<u128>];
export declare class DefaultAssetRegistryAPI implements AssetRegistryAPI {
    private api;
    constructor(api: ApiPromise);
    static metadataToCurrency(metadata: OrmlTraitsAssetRegistryAssetMetadata): Currency;
    static metadataTupleToForeignAsset([key, metadata]: UnwrappedAssetRegistryMetadataTuple): ForeignAsset;
    getAssetRegistryEntries(): Promise<AssetRegistryMetadataTuple[]>;
    /**
     * Static method to filter out metadata that can be unwrapped.ie. `Option.isSome !== true`.
     * @param entries The entries from the asset registry.
     * @returns A list of all entries containing metadata.
     */
    static unwrapMetadataFromEntries(entries: AssetRegistryMetadataTuple[]): UnwrappedAssetRegistryMetadataTuple[];
    getForeignAssets(): Promise<Array<ForeignAsset>>;
    getForeignAsset(id: number | u32): Promise<ForeignAsset>;
    getSystemCollateralCeilingEntries(): Promise<SystemCollateralCeilingTuple[]>;
    extractCollateralCeilingEntryKeys(entries: Array<SystemCollateralCeilingTuple>): Array<InterbtcPrimitivesVaultCurrencyPair>;
    getCollateralForeignAssets(): Promise<Array<ForeignAsset>>;
}